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NEWS
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This file contains information about Fuego releases. It also contains a
(probably incomplete) list of the most important changes or of all
critical bugfixes in releases from a bugfix branch. For a detailed changelog
of changes in the main development branch, consult the version control
history.
Current development version
===========================
* Deterministic mode to make search results reproducible
* Fixed bugs for handling negative (reverse) komi
* Support both boost filesystem v2 and v3
Version 1.1 - 2011 Mar 13
=========================
* Change root filter to move filter - can be called in any tree node
* Improved ladder handling in node filter
* Implemented cgos-gameover to stop pondering
* Handle integer komi - draw possible - in search
* Windows installer
* Limited default memory to 1GB and default threads to 4
Version 1.0 - 2010 Jan 23
=========================
* Command line option parsing is now done with boost::program_options.
Deprecated SgCmdLineOpt is no longer used. Options start with "--".
* Game-independent autobook builder to generate opening books
* Support for propagating proven wins and losses in the UCT tree
* Initial support for static win/loss detection in Go
* New configure parameter --enable-max-size. The parameter --enable-optimize
is no longer supported. The new script setup-build.sh can be used to set up
some commonly used build configurations.
* Use only the same floating point type for all counts and values in
SgUctSearch. The floating point type can be set with the configure
parameter --enable-uct-value-type
* Added generic argument parsing function GtpCommand::Arg<T> and declared
old function (GtpCommand::IntArg() etc.) as deprecated
* Old class GoGame was removed, GoGameRecord renamed to GoGame. GoGame
does no longer provide non-const access to the tree and game state to
guarantee its class invariants
* Made GoPlayer to store its search traces instead of appending them directly
to the game tree
* Several optimizations to speed up the Monte-Carlo searches.
* Fuego now can be compiled natively on Windows with Visual C++ and MinGW.
* The Monte-Carlo search automatically sets reasonable default values for
memory, number of threads and lock-free mode depending on the current
machine.
* New parameters "go_param use_book" and "uct_param_player max_ponder_time"
* Updated opening books
* Play forced opening moves on board size 13 as well
* Fixed bug in SgStatisticsExt::Variance()
* Support for multiple knowledge thresholds
* Renamed some classes (SgSList to SgArrayList, SgProvenNodeType to
SgUctProvenType, SgMoveInfo to SgUctMoveInfo, SgVectorUtility to
SgVectorUtil, GoGtpTimeSettings to GoTimeSettings)
* reuse_subtree is now enabled by default. The interpretation of max_games
changed such that it includes the count of simulations from reused trees.
* Fixes and improvements related to lock-free search, tree pruning, virtual
loss and multiple playouts in SgUctSearch.
* Fix bug #58: Static safety solver misses some unconditionally alive groups
* Other small fixes and improvements.
Version 0.4.1 - 2009 Dec 23
===========================
[Note that the numbering for this version is misleading. This is not a
bugfix release from the stable branch after version 0.4 (VERSION_0_4_FIXES),
but a new release with new and incompatible features from the main branch.]
* Replaced linked list SgList and related functions by SgVector - a wrapper
around std:vector with the same interface as SgList. Changed implementations
that added or removed from front of list for efficiency.
* Added hooks for supporting MPI distributed memory implementations
* Add small opening book for 5x5
* Improved 9x9 opening book
* Added link to optional big 19x19 opening books at Ben Lambrechts' site
* Fixed several bugs in static safety solver
* Updated to compile with gcc 4.4.0
* Implemented SgBalancer to achieve roughly equal number of Black and White
moves of a specific type in playouts
* Implemented randomized use of RAVE for SelectChild
* Support for proven nodes in SgUctSearch
* Support for kgs-time_settings and different KGS overtime modes
* Refactored SgSearch, reduce size of huge functions.
* In SgSearch::SearchEngine, use a stack instead of a vector for efficiency
* New max_memory option to uct_param_search makes Fuego easier to configure
* Implement forced opening moves in GoUctPlayer
* Set bias term constant to 0 by default on all boardsizes
Version 0.4 - 2009 May 22
=========================
* Remove SgStreamFmtRestorer; use Boost IO State Savers instead
* Remove SgUctPriorKnowledge; Derived thread state class will supply knowledge
values through the GenerateAllMoves() function.
* Change move count type in SgUctNode from float to size_t
* Add support for knowledge in the core of the uct tree
Version 0.3 - 2008 Dec 17
=========================
* Change some default settings to be more friendly to end users (e.g.
automatic loading of opening book, set ignore_clock to 0)
* New parameter GoUctPlayer::ResignMinGames
* Filter moves on empty edge in GoUctDefaultRootFilter
* Added fillboard and nakade heuristic as described in recent MoGo paper
(not enabled by default)
* reg_genmove uses now the time limit set with go_param timelimit
* Use weighted RAVE updates in SgUctSearch
* Prune nodes with low visit counts if the tree runs out of memory
* Use different counts in the prior knowledge for small and large board sizes
* New command go_sentinel_file
* Use float type for counts in SgUctNode to allow fractional counts in prior
knowledge
* Add a locality bonus in prior knowledge (caused a big playing strength
increase on 19x19)
* New parameter SgUctSearch::VirtualLoss
* New parameter GoUctGlobalSearchStateParam::m_lengthModification (used on
19x19)
* Use real time as default mode for SgTime
* Don't use SgTimeControl::ReserveMoveConstant anymore
* Other improvements and fixes
Version 0.2 - 2008 Aug 28
=========================
* Declare data members of UCT nodes and signature statistis as volatile.
This avoids that the compiler reorders writes, which could cause crashes
if the UCT search is used in lock-free mode.
* Fix bug that caused reusing the subtree not to work (if options
reuse_subtree or ponder were used)
Version 0.1 - 2008 May 30
=========================
Initial release. Compilation and functionality are tested on current Linux
distributions (Fedora 8, Ubuntu 8.04 LTS) and Mac OS X.